<?php

class zip
{
var $datasec,$ctrl_dir = array();
var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
var $old_offset = 0;var $dirs = Array(".");
function get_List($zip_name)
{
$ret = '';
$zip = @fopen($zip_name,'rb');
if(!$zip)
{
return(0);
}
$centd = $this->ReadCentralDir($zip,$zip_name);
@rewind($zip);
@fseek($zip,$centd['offset']);
for ($i=0;$i<$centd['entries'];$i++)
{
$header = $this->ReadCentralFileHeaders($zip);
$header['index'] = $i;$info['filename'] = $header['filename'];
$info['stored_filename'] = $header['stored_filename'];
$info['size'] = $header['size'];$info['compressed_size']=$header['compressed_size'];
$info['crc'] = strtoupper(dechex( $header['crc'] ));
$info['mtime'] = $header['mtime'];$info['comment'] = $header['comment'];
$info['folder'] = ($header['external']==0x41FF0010||$header['external']==16)?1:0;
$info['index'] = $header['index'];$info['status'] = $header['status'];
$ret[]=$info;unset($header);
}
return $ret;
}
function Add($files,$compact)
{
if(!is_array($files[0]))
{
$files=Array($files);
}
for($i=0;$files[$i];$i++)
{
$fn = $files[$i];
if(!in_Array(dirname($fn[0]),$this->dirs))
{
$this->add_Dir(dirname($fn[0]));
}
if(basename($fn[0]))
{
$ret[basename($fn[0])]=$this->add_File($fn[1],$fn[0],$compact);
}
}
return $ret;
}
function get_file()
{
$data = implode('',$this ->datasec);
$ctrldir = implode('',$this ->ctrl_dir);
return $data .$ctrldir .$this ->eof_ctrl_dir .
pack('v',sizeof($this ->ctrl_dir)).pack('v',sizeof($this ->ctrl_dir)).
pack('V',strlen($ctrldir)) .pack('V',strlen($data)) ."\x00\x00";
}
function add_dir($name)
{
$name = str_replace("\\","/",$name);
$fr = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00";
$fr .= pack("V",0).pack("V",0).pack("V",0).pack("v",strlen($name) );
$fr .= pack("v",0 ).$name.pack("V",0).pack("V",0).pack("V",0);
$this ->datasec[] = $fr;
$new_offset = strlen(implode("",$this->datasec));
$cdrec = "\x50\x4b\x01\x02\x00\x00\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00";
$cdrec .= pack("V",0).pack("V",0).pack("V",0).pack("v",strlen($name) );
$cdrec .= pack("v",0 ).pack("v",0 ).pack("v",0 ).pack("v",0 );
$ext = "\xff\xff\xff\xff";
$cdrec .= pack("V",16 ).pack("V",$this ->old_offset ).$name;
$this ->ctrl_dir[] = $cdrec;
$this ->old_offset = $new_offset;
$this ->dirs[] = $name;
}
function CompileZipFile($filename,$tozipfilename,$ftype='dir')
{
if (@function_exists('gzcompress'))
{
if($ftype=='dir')
{
$filelist =  $this->ListDirFiles($filename);
}
else if($ftype=='file')
{
$filelist[] =  $filename;
}
else
{
$filelist =  $filename;
}
$i = 0;
if(count($filelist)>0)
{
foreach($filelist as $filename)
{
if (is_file($filename))
{
$i++;
$fd = fopen ($filename,"r");
if(filesize($filename)>0)
{
$content = fread($fd,filesize($filename));
}
else
{
$content = ' ';
}
fclose ($fd);
$this->add_File($content,$filename);
}
}
$out = $this->get_file();
$fp = fopen($tozipfilename,"w");
fwrite($fp,$out,strlen($out));
fclose($fp);
}
return $i;
}
else
{
return 0;
}
}
function ListDirFiles($dirname)
{
$files = array();
if(is_dir($dirname))
{
$fh = opendir($dirname);
while (($file = readdir($fh)) !== false)
{
if (strcmp($file,'.')==0 ||strcmp($file,'..')==0)
{
continue;
}
$filepath = $dirname .'/'.$file;
if ( is_dir($filepath) )
{
$files = array_merge($files,$this->ListDirFiles($filepath));
}
else
{
array_push($files,$filepath);
}
}
closedir($fh);
}
else
{
$files = false;
}
return $files;
}
function add_File($data,$name,$compact = 1)
{
$name     = str_replace('\\','/',$name);
$dtime    = dechex($this->DosTime());
$hexdtime = '\x'.$dtime[6] .$dtime[7].'\x'.$dtime[4] .$dtime[5]
.'\x'.$dtime[2] .$dtime[3].'\x'.$dtime[0].$dtime[1];
eval('$hexdtime = "'.$hexdtime .'";');
if($compact)
$fr = "\x50\x4b\x03\x04\x14\x00\x00\x00\x08\x00".$hexdtime;
else
{
$fr = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00".$hexdtime;
}
$unc_len = strlen($data);$crc = crc32($data);
if($compact)
{
$zdata = gzcompress($data);$c_len = strlen($zdata);
$zdata = substr(substr($zdata,0,strlen($zdata) -4),2);
}
else
{
$zdata = $data;
}
$c_len=strlen($zdata);
$fr .= pack('V',$crc).pack('V',$c_len).pack('V',$unc_len);
$fr .= pack('v',strlen($name)).pack('v',0).$name.$zdata;
$fr .= pack('V',$crc).pack('V',$c_len).pack('V',$unc_len);
$this ->datasec[] = $fr;
$new_offset        = strlen(implode('',$this->datasec));
if($compact)
{
$cdrec = "\x50\x4b\x01\x02\x00\x00\x14\x00\x00\x00\x08\x00";
}
else
{
$cdrec = "\x50\x4b\x01\x02\x14\x00\x0a\x00\x00\x00\x00\x00";
}
$cdrec .= $hexdtime.pack('V',$crc).pack('V',$c_len).pack('V',$unc_len);
$cdrec .= pack('v',strlen($name) ).pack('v',0 ).pack('v',0 );
$cdrec .= pack('v',0 ).pack('v',0 ).pack('V',32 );
$cdrec .= pack('V',$this ->old_offset );
$this ->old_offset = $new_offset;
$cdrec .= $name;
$this ->ctrl_dir[] = $cdrec;
return true;
}
function DosTime()
{
$timearray = getdate();
if ($timearray['year'] <1980)
{
$timearray['year'] = 1980;$timearray['mon'] = 1;
$timearray['mday'] = 1;$timearray['hours'] = 0;
$timearray['minutes'] = 0;$timearray['seconds'] = 0;
}
return (($timearray['year'] -1980) <<25) |($timearray['mon'] <<21) |($timearray['mday'] <<16) |($timearray['hours'] <<11) |
($timearray['minutes'] <<5) |($timearray['seconds'] >>1);
}
function ExtractAll ( $zn,$to)
{
if(substr($to,-1)!="/")
{
$to .= "/";
}
$files = $this->get_List($zn);
$cn = count($files);
if(is_array($files))
{
for($i=0;$i<$cn;$i++)
{
if($files[$i]['folder']==1)
{
@mkdir($to.$files[$i]['filename'],$GLOBALS['cfg_dir_purview']);
@chmod($to.$files[$i]['filename'],$GLOBALS['cfg_dir_purview']);
}
}
}
$this->Extract ($zn,$to);
}
function Extract ( $zn,$to,$index = Array(-1) )
{
$ok = 0;$zip = @fopen($zn,'rb');
if(!$zip)
{
return(-1);
}
$cdir = $this->ReadCentralDir($zip,$zn);
$pos_entry = $cdir['offset'];
if(!is_array($index))
{
$index = array($index);
}
for($i=0;isset($index[$i]);$i++)
{
if(intval($index[$i])!=$index[$i]||$index[$i]>$cdir['entries'])
{
return(-1);
}
}
for ($i=0;$i<$cdir['entries'];$i++)
{
@fseek($zip,$pos_entry);
$header = $this->ReadCentralFileHeaders($zip);
$header['index'] = $i;$pos_entry = ftell($zip);
@rewind($zip);fseek($zip,$header['offset']);
if(in_array("-1",$index)||in_array($i,$index))
{
$stat[$header['filename']]=$this->ExtractFile($header,$to,$zip);
}
}
fclose($zip);
return $stat;
}
function ReadFileHeader($zip)
{
$binary_data = fread($zip,30);
$data = unpack('vchk/vid/vversion/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len',$binary_data);
$header['filename'] = fread($zip,$data['filename_len']);
if ($data['extra_len'] != 0)
{
$header['extra'] = fread($zip,$data['extra_len']);
}
else
{
$header['extra'] = '';
}
$header['compression'] = $data['compression'];$header['size'] = $data['size'];
$header['compressed_size'] = $data['compressed_size'];
$header['crc'] = $data['crc'];$header['flag'] = $data['flag'];
$header['mdate'] = $data['mdate'];$header['mtime'] = $data['mtime'];
if ($header['mdate'] &&$header['mtime'])
{
$hour=($header['mtime']&0xF800)>>11;$minute=($header['mtime']&0x07E0)>>5;
$seconde=($header['mtime']&0x001F)*2;$year=(($header['mdate']&0xFE00)>>9)+1980;
$month=($header['mdate']&0x01E0)>>5;$day=$header['mdate']&0x001F;
$header['mtime'] = mktime($hour,$minute,$seconde,$month,$day,$year);
}
else
{
$header['mtime'] = time();
}
$header['stored_filename'] = $header['filename'];
$header['status'] = "ok";
return $header;
}
function ReadCentralFileHeaders($zip)
{
$binary_data = fread($zip,46);
$header = unpack('vchkid/vid/vversion/vversion_extracted/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len/vcomment_len/vdisk/vinternal/Vexternal/Voffset',$binary_data);
if ($header['filename_len'] != 0)
{
$header['filename'] = fread($zip,$header['filename_len']);
}
else
{
$header['filename'] = '';
}
if ($header['extra_len'] != 0)
{
$header['extra'] = fread($zip,$header['extra_len']);
}
else
{
$header['extra'] = '';
}
if ($header['comment_len'] != 0)
{
$header['comment'] = fread($zip,$header['comment_len']);
}
else
{
$header['comment'] = '';
}
if ($header['mdate'] &&$header['mtime'])
{
$hour = ($header['mtime'] &0xF800) >>11;
$minute = ($header['mtime'] &0x07E0) >>5;
$seconde = ($header['mtime'] &0x001F)*2;
$year = (($header['mdate'] &0xFE00) >>9) +1980;
$month = ($header['mdate'] &0x01E0) >>5;
$day = $header['mdate'] &0x001F;
$header['mtime'] = mktime($hour,$minute,$seconde,$month,$day,$year);
}
else
{
$header['mtime'] = time();
}
$header['stored_filename'] = $header['filename'];
$header['status'] = 'ok';
if (substr($header['filename'],-1) == '/')
{
$header['external'] = 0x41FF0010;
}
return $header;
}
function ReadCentralDir($zip,$zip_name)
{
$size = filesize($zip_name);
if ($size <277)
{
$maximum_size = $size;
}
else
{
$maximum_size=277;
}
@fseek($zip,$size-$maximum_size);
$pos = ftell($zip);$bytes = 0x00000000;
while ($pos <$size)
{
$byte = @fread($zip,1);$bytes=($bytes <<8) |Ord($byte);
if ($bytes == 0x504b0506)
{
$pos++;break;
}
$pos++;
}
$data = @unpack('vdisk/vdisk_start/vdisk_entries/ventries/Vsize/Voffset/vcomment_size',fread($zip,18));
if ($data['comment_size'] != 0)
{
$centd['comment'] = fread($zip,$data['comment_size']);
}
else
{
$centd['comment'] = '';$centd['entries'] = $data['entries'];
}
$centd['disk_entries'] = $data['disk_entries'];
$centd['offset'] = $data['offset'];$centd['disk_start'] = $data['disk_start'];
$centd['size'] = $data['size'];$centd['disk'] = $data['disk'];
return $centd;
}
function ExtractFile($header,$to,$zip)
{
$header = $this->readfileheader($zip);
$header['external'] = (!isset($header['external']) ?0 : $header['external']);
if(substr($to,-1)!="/")
{
$to.="/";
}
if(!@is_dir($to))
{
@mkdir($to,$GLOBALS['cfg_dir_purview']);
}
if (!($header['external']==0x41FF0010)&&!($header['external']==16))
{
if ($header['compression']==0)
{
$fp = @fopen($to.$header['filename'],'wb');
if(!$fp)
{
return(-1);
}
$size = $header['compressed_size'];
while ($size != 0)
{
$read_size = ($size <2048 ?$size : 2048);
$buffer = fread($zip,$read_size);
$binary_data = pack('a'.$read_size,$buffer);
@fwrite($fp,$binary_data,$read_size);
$size -= $read_size;
}
fclose($fp);
touch($to.$header['filename'],$header['mtime']);
}
else
{
$fp = @fopen($to.$header['filename'].'.gz','wb');
if(!$fp)
{
return(-1);
}
$binary_data = pack('va1a1Va1a1',0x8b1f,Chr($header['compression']),
Chr(0x00),time(),Chr(0x00),Chr(3));
fwrite($fp,$binary_data,10);
$size = $header['compressed_size'];
while ($size != 0)
{
$read_size = ($size <1024 ?$size : 1024);
$buffer = fread($zip,$read_size);
$binary_data = pack('a'.$read_size,$buffer);
@fwrite($fp,$binary_data,$read_size);
$size -= $read_size;
}
$binary_data = pack('VV',$header['crc'],$header['size']);
fwrite($fp,$binary_data,8);fclose($fp);
$gzp = @gzopen($to.$header['filename'].'.gz','rb') or die("Cette archive est compress");
if(!$gzp)
{
return(-2);
}
$fp = @fopen($to.$header['filename'],'wb');
if(!$fp)
{
return(-1);
}
$size = $header['size'];
while ($size != 0)
{
$read_size = ($size <2048 ?$size : 2048);
$buffer = gzread($gzp,$read_size);
$binary_data = pack('a'.$read_size,$buffer);
@fwrite($fp,$binary_data,$read_size);
$size -= $read_size;
}
fclose($fp);gzclose($gzp);
touch($to.$header['filename'],$header['mtime']);
@unlink($to.$header['filename'].'.gz');
}
}
return true;
}
?>